Insects As Common Carriers.- great strides have been made in recent years by scientists in regards to the further prevention of disease by studying the life habits of insects.  It has been clearly proven that the poison or germ of certain diseases are carried by them, such as tuberculosis, typhoid fever, bowel complaints of children, by the common housefly; malaria and yellow fever by the mosquito; the bubonic plague by the rat flea, of which there are several varieties, and the squirrel flea, of which there are also several.

It is easily understood that to prevent the spread of a contagious disease from one individual to another, the precautions are not complete unless he or she be protected against either the bite of a mosquito or fleet which is received into its own blood the poison or the germ causing the disease, which conveys by biting another person.  Fly should be kept out as, by coming in contact with the spittle or discharges from a patient, they carry the germ of poison upon their feet, etc. to the food, milk, water and by direct contact to another person.

As to aid in the prevention of disease, the numerous boards of health of city and state have issued regulations and instructions whereby these insects can be destroyed and then every person, sick or well, can be protected.  If well, the flight is a danger by bringing disease into her home, if ill, it can convey our disease to another screen is home and start an epidemic.

There is distinctly different set of priorities that are being covered in this book than those we might consider today.  Typically malaria for example is only known in the tropics, but that definitive line on the globe might not have been known about back then.  Installing screens on Windows had a dual benefit of keeping out mosquitoes as well as flies.  Today we might worry about getting a discount on budget software or spending less time in traffic, but back then mosquitoes had much larger impact on the lives of people in the west much as the same insects have a great impact on people that live in Africa today.